This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 29 |
| 5 | 2 |
| 6 | 91 |
| 7 | 2 |
| 8 | 48 |
| 9 | 11 |
| 10 | 91 |
| 11 | 999001 |
| 12 | 11 |
| 13 | 91 |
| 14 | 98912026 |
| 15 | 99990001 |
| 16 | 11 |
| 17 | 909091 |
| 18 | 99999990000001 |